Bad strategy to introduce the topic: Batman debuted in comic books in 1939 and has been popular ever since. Batman was a television show in the 1960’s and was also remade into many feature-length movies. These movies include Batman & Robin, Batman, Batman Returns, Batman Forever, and The Dark Knight Trilogy.
This example discusses the history of Batman and lists various movies, but the focus is broad, and it doesn’t even mention Michael Keaton. Remember, you’re writing an evaluation essay about Michael Keaton, so he should probably be mentioned in the introduction!